The J2EE™ Tutorial Second Edition

Advanced CMP Topics: The OrderApp Example

The OrderApp application is an advanced CMP example. It contains entity beans that have self-referential relationships, one-to-one relationships, unidirectional relationships, unknown primary keys, primitive primary key types, and composite primary keys.

Structure of OrderApp

OrderApp is a simple inventory and ordering application for maintaining a catalog of parts and placing an itemized order of those parts. It has entity beans that represent parts, vendors, orders, and line items. These entity beans are accessed using a stateful session bean that holds the business logic of the application. A simple command-line client adds data to the entity beans, manipulates the data, and displays data from the ...